Bushing for air-pin plates.



No. 841,665. PATENTED JAN. 22, 1907.

J. .F. CHAMBERS.

BUSHING FOR AIR PIN PLATES.

APPLIQATION FILED 00T.26, 1906."

, m W m V N WITNE X "i Affomey UNITED sTATEs PATENT oEEIoE.

JONATHAN F. CHAMBERS, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO URIEL O. HAYS, Jlt, OF WASHINGTON,

DISTRICT OF COLUMBIA.

BUSHING FOR AIR-PIN PLATES.

Specification of Letters Patent.

Patented Jan. 22, 1907.

To all whom it nuty concern.-

Be it known that I, JONATHAN F. CHAM- BERS, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements inBushings for Air-Pin Plates and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in means for holding air-pins in air-pin plates forming a part of the monotype casting-machine; and the object of the invention is to produce a simple and efiicient device of this nature whereby the removal of the air-pins for cleaning the same and replacing the pins may be easily accomplished without detaching various parts of the apparatus, which is necessary with the usual monotype-machine.

In the punching apparatus upon keyboard mechanism when the perforations are made in the paper the punches usually do not form a clear perforation, with the result that when the paper passes over the air-tower of the casting-machine the ends of the parts which are left in the perforations are blown into the air-pipes, which naturally in a short time would clog the latter; and it is the object of the present invention to produce bushings each adapted to hold an air-pin and so arranged that each pin may be removed independent of the others without the necessity of tearing the machine down in order to removethe air-pins, which is necessary with the machines now employed. By means of the bushing all that is necessary is to unscrew the latter, which will give access to the defective or clogged pin, thereby effecting a large saving of time incident to cleaning the same.

More specifically, the invention comprises bushings each of which is provided with a threaded circumference adapted to engage the threads of apertures in the air-pin plate and each bushing provided with a central opening for the reception of the air-pin, the bushings being so constructed that they may be engaged by a suitable tool for the purpose of turning the same when it is desired to remove or replace the bushings.

My invention is illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which Figure 1 is a top plan view of an air-pin plate of a monotype casting-machine. 2 is a sectional view on line 2 2 of Fig. 1, and Fig. 3 is a detail view of one of the bushings.

Reference now being had to the details of the drawings by letter, A designates an airpin plate of the usual construction, provided with a series of apertures B, the margin of each aperture being provided with threads, and O- is a bushing the circumference of which is provided with threads C, adapted to engage the threads formed in the marginal edges of said openings. In order to facilitate the adjustment of said bushings within their respective threaded apertures or removing the bushings therefrom, each bushing .is provided, preferably, with two holes or indentures D, adapted to receive a spanner or other tool, whereby the bushing may be turned one way or the other. The opening in each bushing is without threads and is adapted to receive the contracted end E of the air-pin E. Each of said air-pins has a shoulder F, adapted to contact with the under edge of the bushing when the latter is adjusted in the aperture of the pin-plate and serves to limit its upper throw. The pinplate A is fastened by screws G to the plate H, which has registering apertures to receive the air-pins, and said plate H rests upon a backing K, through which the air-supply pipes N lead, there being a pipe N leading to each aperture through the plate H, whereby air under pressure may be conducted to the air-plate for the purpose of throwing the air-pins above the upper surface of the airpin plate. A spring O is interposed between the shoulder R of each air-pin and the under edge of a bushing, serving to return the pin to its normal position after having been driven upward by means of air-pressure.

From the foregoing it will be noted that by the provision of the bushings having threaded connections with the air-pin plate the pins may be easily and quickly removed when it is desired to clean the same of foreign matter which frequently adheres to the contact-surface of the pin and the wall of the aperture in which it is mounted, the removal of the bushings being by means of a spannerwrench or other tool, the points of which are inserted in the holes in the outer face of the bushing, thereby greatly expediting its action, whereas by the old method commonly in use upon monotype casting-machines it is necessary to remove the entire plate and detach other parts of the apparatus, which makes it a laborious task to clean the various pins and also consuming considerable time in readjusting the parts.

What I claim is 1. The combination with an air-pin plate of a monotype casting-machine, a series of detachable bushings carried by the plate adapted to receive a series of pins extending therethrough, as set forth.

2 The combination with an air-pin plate of a monotype casting-machine, a series of detachable bushings carried by the plate, and air-pins extending through said bushings and held in place thereby, as set forth.

3. The combination with an air-pin plate of a monotype casting-machine, a series of detachable bushings carried by the plate, each having threaded connection with the threads in the margins of apertures in said pin-plate, and air-pins extending through said bushings and retained in place thereby, as set forth.

4. The combination with an air-pin plate of a monotype casting-machine, a series of bushings having their outer surfaces threaded and engaging threads in the apertures of said plate, the opening in each bushing being threadless, pins each passing through a bushing and provided each with a shoulder adapted to contact with the inner end of the bushing to limit the throw of the pin in one direction, and springs for returning the pins to their normal positions, as set forth.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

JONATHAN F. CHAMBERS.

Witnesses:

URIEL C. HAYS, Jr., A. L. HOUGH. 

